when I try to open mysite./index/customize I see that:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body style="font:18px Tahoma;">
Error 500<br />Internal Server Error.
</body>
</html>
help me
